Investigation of Plasticizing Admixtures Used in Hungarian Building Industry

2008 ◽  
Vol 589 ◽  
pp. 439-444
Author(s):  
Márton Takács
Keyword(s):  
Research Work ◽  
Cost Effective ◽  
Test Methods ◽  
Standard Test ◽  
Flow Table ◽  
Main Effect ◽  
Increased Strength ◽  
Work Effect ◽  
Chemical Materials

There is no doubt that concrete makes a massive contribution to sustaining the quality of life. Properties of concrete can be expediently modified by adding special chemical materials called admixtures. Admixtures for concrete are now widely accepted as materials that contribute to the production of durable and cost-effective concrete structures [1]. Plasticizing admixtures reduce water needed to achieve a given workability of the fresh mix. This main effect can be utilized in three ways: increased strength, increased workability, or economies in mix design [2]. In this research work effect of type and dosage of different plasticizing admixtures available in Hungary were investigated in detail. Standard test methods such as flow table test, compressive test, and shrinkage test were applied to obtain effectiveness of the admixtures. Results were compared with the requirements of the harmonized admixture standard MSZ EN 934-2:2002.

Investigation of Performance of Superplasticizing Admixtures Used in Hungarian Building Industry

2008 ◽  
Vol 589 ◽  
pp. 445-450
Author(s):  
Márton Takács ◽  
Ferenc Nemoda
Keyword(s):  
Construction Material ◽  
Research Work ◽  
Test Methods ◽  
Standard Test ◽  
New Materials ◽  
Compressive Test ◽  
Flow Table ◽  
Work Effect ◽  
The Eu ◽  
Chemical Materials

Concrete is the strongest candidate to be the most important construction material of the 21st century. This can be ensured by the continuous research and development of new materials and technologies regarding concrete construction. Properties of concrete can be expediently modified by adding special chemical materials called admixtures. In this research work effect of type and dosage of different superplasticizing admixtures available in Hungary were investigated in detail. Standard test methods such as flow table test and compressive test were applied to obtain effectiveness of the admixtures. Regarding the examinations done in the course of the research, we refer to the regulations of the EU harmonized admixture standard currently valid in Hungary MSZ EN 934-2:2002. In connection to that we will precisely quote the requirements specified in the standard regarding superplasticizers and will also mention the main differences compared to the plasticizer additives. Types, properties and use of superplasticizers are introduced in detail, too. Experimental results are evaluated to rate the efficiency in compliance with the requirements of the standard.

scholarly journals Comparison of Two Intergranular Corrosion Tests on EN AW-6016 Sheet Material

2021 ◽  
Vol 11 (11) ◽  
pp. 5294
Author(s):  
Peer Decker ◽  
Ines Zerbin ◽  
Luisa Marzoli ◽  
Marcel Rosefort
Keyword(s):  
Optical Microscopy ◽  
Intergranular Corrosion ◽  
Sheet Material ◽  
Test Methods ◽  
Standard Test ◽  
Corrosion Depth ◽  
Corrosion Tests ◽  
Automotive Company ◽  
Test Parameters

Two different intergranular corrosion tests were performed on EN AW-6016 sheet material, an ISO 11846:1995-based test with varying solution amounts and acid concentrations, and a standard test of an automotive company (PV1113, VW-Audi). The average intergranular corrosion depth was determined via optical microscopy. The differences in the intergranular corrosion depths were then discussed with regard to the applicability and quality of the two different test methods. The influence of varying test parameters for ISO 11846:1995 was discussed as well. The determined IGC depths were found to be strongly dependent on the testing parameters, which will therefore have a pronounced influence on the determined IGC susceptibility of a material. In general, ISO 11846:1995 tests resulted in a significantly lower corrosion speed, and the corrosive attack was found to be primarily along grain boundaries.

scholarly journals Nutritional Quality of Formulated Complementary Foods and their Biological Effects for Tackling Malnutrition in Sub-Saharan Africa (SSA) Countries

2020 ◽  
pp. 91-103
Author(s):  
Wilfred Damndja Ngaha ◽  
Richard Aba Ejoh ◽  
Edith Nig Fombang ◽  
William Dzusuo Tedom
Keyword(s):  
Nutritional Quality ◽  
Biological Effects ◽  
Research Work ◽  
Cost Effective ◽  
Sub Saharan Africa ◽  
Complementary Foods ◽  
Food Ingredients ◽  
Research Findings ◽  
Sub Saharan

Toddlers malnutrition is a health problem in developing countries like those found in Sub-Saharan Africa. Owing to prevalence of poverty, families are generally not able to afford the commercial complementary foods available in the market stalls, since such complementary foods are imported and made from non-local foodstuffs. In order to overcome these issues, FAO/WHO recommends the use of local foodstuffs in formulation of complementary foods and defines the virtues that the complementary foods should possess. In this light, researchers in Sub-Saharan Africa have proposed several formulations of complementary foods. The present work reviews these research findings on complementary foods available in the Sub-Saharan Africa utilizing the local food materials, the treatment that is required to be meted to such food ingredients, nutritional quality of formulated complementary foods and ultimately their biological effects. The limitations of the research work, if any, has been highlighted and the means to take such research forward that would be helpful in the production and commercialization of cost-effective complementary foods possessing requisite nutritional quality and biological effects as per dietary norms laid down by competent authorities.

scholarly journals Robust Multi-Area Economic Dispatch Using Coulomb’s and Franklin’s Laws Based Optimizer

2020 ◽  
Vol 10 (4) ◽  
pp. 235-251
Author(s):  
Vadugapalayam Ponnuvel Sakthivel ◽  
Murugesan Suman ◽  
Palanigounder Duraisamy Sathya
Keyword(s):  
State Of The Art ◽  
Cost Effective ◽  
New Physics ◽  
Standard Test ◽  
Economic Load Dispatch ◽  
Exchange Market ◽  
Suggested Approach ◽  
Generation Planning ◽  
Excess Power

The multi-area economic load dispatch (MAELD) can reduce running costs through making the areas with more cost-effective units produce more energy.  The excess power is transferred to the areas with expensive units. This paper contributes a new physics inspired metaheuristic approach called the Coulomb’s and Franklin’s laws based optimizer (CFLBO) to solve the MAELD problem. The CFLBO approach is developed from Coulomb’s and Franklin’s theories, which comprise attraction/repulsion, probabilistic ionization, and contact stages. The effectiveness of the envisaged CFLBO approach has been examined on three standard test systems with various areas. Results obtained by the CFLBO approach are compared with the exchange market algorithm (EMA) and the existing state-of-the-art approaches to deal with MAELD. Numerical outcomes show the benefits of the quick convergence and better quality of the suggested approach compared to existing strategies. Consequently, the proposed approach is a helpful tool for generation planning in MAELD problems.

Priorities for development of standard test methods to support the commercialization of cellulose nanomaterials

TAPPI Journal ◽  
2019 ◽  
Vol 18 (4) ◽  
pp. 245-260 ◽  
Author(s):  
STEPHANIE BECK ◽  
COLLEEN WALKER ◽  
WARREN BATCHELOR
Keyword(s):  
Test Methods ◽  
Standard Test ◽  
Technical Committee ◽  
Task Group ◽  
Standard Procedures ◽  
Control Production ◽  
Cellulose Nanomaterials ◽  
Survey Responses ◽  
Physical And Chemical

With the growing number of producers and users of cellulose nanomaterials (CNMs), there is an increasing need to develop standard test methods to control production and quality of CNMs. In 2014, a Task Group was formed within the ISO Technical Committee 6 Paper, board and pulps to begin addressing the need for standards. This Task Group, TG 1, was tasked with reviewing existing standards and identifying the need for additional standards to characterize CNMs. In March 2018, TG 1 launched a survey to ask CNM producers around the world about the importance of having standard procedures to measure and quantify a variety of CNM properties, both physical and chemical. Producers were asked to identify the type(s) of CNM they produced and their scale of production, and to rank the properties for which they felt standard test methods were most important. In this paper, we summarize the survey responses and identify those properties of highest interest for producers of both cellulose nanocrystals (CNCs) and cellulose nano- and microfibril-based materials (CNFs/CMFs). Properties of importance can be divided into three broad groups: i) a standard has either been developed or is under development, ii) a currently used standard could be adapted for use with CNMs, or iii) no standard is currently available and further R&D and consultation with industry is needed before a suitable and well-validated standard can be developed. The paper also examines the challenges of developing new standard methods for some of the key properties—as well as the feasibility and limitations of adapting exiting standards—to CNMs.

scholarly journals SPECIAL ASPECTS OF THE PARAMETERS ASSESSMENT OF COMMUNICATION CHANNELS OF UNMANNED AERIAL SYSTEMS CLASSI AND II

2020 ◽  
pp. 41-48
Author(s):  
V. Ilienko ◽  
O. Isachenko ◽  
A. Los ◽  
M. Gerashchenko ◽  
S. Rudnichenko
Keyword(s):  
Communication Channels ◽  
Armed Forces ◽  
Test Methods ◽  
Control Site ◽  
Standard Test ◽  
Class I ◽  
Unmanned Aerial Systems ◽  
Electronic Warfare ◽  
Aerial Systems

Considering the lack of standard test methods for communication channels of modern unmanned aerial systems (UAS) class I and II, according to the UAS classification of the Armed Forces of Ukraine, it was decided to work out the basic approaches for determining indicators, conditions and procedure for conducting tests in this direction. The suggested methodological recommendations will improve the quality of the parameters and characteristics assessment for communication channels of UAS I and II classes. One of the distinctive trends in the development of modern forms and methods of conducting armed combat at all stages of the armed conflict is the widespread use of the UASs by opposing parties. UASs are capable of significant increasing the effectiveness of accomplishing aerial reconnaissance tasks, organizing electronic warfare, and providing real-time delivery of target pinpointing to fire means for the destruction of enemy’s manpower and material. A distinctive feature of UAS is that its external crew, as a rule, accomplish its mission at a considerable distance from the objects of attack. This fact significantly reduces the security risks and threats associated with performing combat missions under conditions of active enemy counteraction. Due to this feature, considerable attention is paid to the development of a reliable communication system that would be able to ensure task accomplishment at the maximum distance from command and control site. During the tests of UAS Class I and II, the specialists of the State Scientific Research Institute of Armament and Military Equipment Testing and Certification used testing methods of radio channels assessment, which will allow to improve the quality of UAS research of this type and give the manufacturers recommendations for increasing their capabilities.

scholarly journals Quality Assessment of Road Shoulders using Light Weight Deflectometer and Geogauge

2019 ◽  
Vol 8 (2) ◽  
pp. 3107-3114
Keyword(s):  
Cost Effective ◽  
Standard Test ◽  
Dry Density ◽  
Light Weight ◽  
Destructive Testing ◽  
The Road ◽  
Light Weight Deflectometer ◽  
Non Destructive

Shoulders are an important element of the highways that provide space for vehicles to stop during an emergency. A well-compacted shoulder provides structural firmness to a pavement by transferring overlying traffic loads to the underlying soil stratum. They provide lateral support to the pavement. In recent years, the use of non-destructive testing devices like Geogauge and Light Weight Deflectometer (LWD) has emerged in our country. The main reason behind this is the inbuilt ability of Geogauge and LWD in the fast estimation of the elastic modulus of a shoulder on top of their ease to port, being cost-effective, the capability to give more amounts of data, etc. Thus, there is a need to assess these devices. The main objective of this paper is to develop correlations between the parameter obtained from these non-destructive devices and destructive test parameterslike dry density and CBR. The tests were conducted on thirty-two locations of road shoulders at the city of Patna, India. Geogauge, LWD and sand replacement or sand cone testing were performed at different locations and soil samples were collected for determination of CBR and water content in the laboratory. The result of regression analysis shows that a significant correlation exists between moduli obtained from the devices under investigation and standard test results i.e. dry density and CBR. These developed correlations may be used by the road engineers for assessment of the quality of the shoulders.

scholarly journals The appraisal of Testing centre of the JSC “The URIR named after A. S. Berezhnoy” on compliance of the measurement management system with requirements of the ДСТУ ISO 10012:2005

2019 ◽  
Vol 119 ◽  
pp. 122-126
Author(s):  
P. O. Kushchenko ◽  
O. V. Dunikov ◽  
V. V. Varganov
Keyword(s):  
Management System ◽  
Raw Materials ◽  
Thermomechanical Properties ◽  
Test Methods ◽  
Standard Test ◽  
Current Standards

For many years, the refractory and refractory raw materials have been successfully tested at the Testing centre of the JSC “The URIR named after A. S. Berezhnoy” for the orders of manufacturers and consumers of refractory products and for the institute’s own needs. Testing of refractory products is carried out in order to determine the physicochemical, physico­mechanical, thermophysical and thermomechanical properties and assess the quality of refractories and refractory raw materials. When conducting tests of refractories in the Testing centre of institute, standard test methods are used in accordance with the current standards in Ukraine and the methods developed at the institute. In this article, features of the measurement management system in Testing centre of the JSC “The URIR named after A. S. Berezhnoy” and results of the appraisal of Testing centre of the institute are adduced.

Influence of mineral elements on the yield and quality of grain of the prospective line in winter tritikale

2020 ◽  
Author(s):  
I.N. Voronchikhina ◽  
◽  
A.G. Marenkova ◽  
V. S. Rubets ◽  
V. V. Pylnev
Keyword(s):  
Cost Effective ◽  
Mineral Elements ◽  
Early Spring ◽  
High Potential ◽  
Winter Triticale ◽  
Yield And Quality ◽  
Fertilizer System

The results of elements development of varietal agrotechnics of a new high-potential line 238h of winter triticale presented. It was identified that under the conditions of 2020 the most cost effective fertilizer system is an early spring application of NPK (S) (15-15-15 (10)) at a dose of 200kg/ha. The profitability level of this fertilizer was 88,9%.

Regulatory Issues in Pakistan Telecommunication

1998 ◽  
Vol 37 (4II) ◽  
pp. 873-882 ◽  
Author(s):  
Sarfaraz Khan Quershi
Keyword(s):  
National Economy ◽  
Cost Effective ◽  
Market Forces ◽  
Global Trends ◽  
Regulatory Issues ◽  
Competitive Price ◽  
Modern Services ◽  
A Company ◽  
Telecom Infrastructure

Growth in telecom infrastructure and provision of modern telecom services to consumers at a cost based tariff helps growth of national economy. Modern telecoms serve as the engine of growth of national economy. Following the global trends of liberalisation and deregulation in telecoms monopolies which have thus far been providing inefficient communication at a greedily high tariffs are falling apart. Mergers in telecoms are not for increasing the size of the monopoly but to provide more efficient and cost effective services to the consumers. In Pakistan the erstwhile T&T department played a needful role at its time. Conversion of the department into a corporation and then into a company were steps necessary for following the global trends. Need now is to continue this trend further, eliminate the monopolistic approach by allowing more players in the field thus permitting the market forces to decide the provision of better quality of modern services at competitive price.

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